Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic

Where it lives

For P2590, the circuit described runs through the sensor. The description of P2590 reports a fault at the sensor.

Check these first

• A loose or chafed turbocharger boost control position sensor B wire
• Corrosion at the sensor B connector
• A failing turbocharger boost control position sensor B
• A sticking wastegate or boost control valve

What to do next

1. Read turbocharger boost control position sensor B on a scan tool while wiggling the harness
2. Inspect the sensor B wiring for chafe or looseness
3. Check the sensor B connector for corrosion
4. Check the wastegate or boost control valve for sticking
5. Replace the turbocharger boost control position sensor B if the harness tests good
6. Clear the code and retest

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